Re: Engine HOT - A/C off on 2006 STS-V

Ugh, this stupid light keeps coming on. Replacing Thermo, and Water Pump since it's leaking. The damn dealer wanted around $1000 to fix both lol. Luckily one of their retired mechanics just lives up the street from me.

Re: Engine HOT - A/C off on 2006 STS-V

temp gauge is not working as of last night. After reading this post it looks like I have the same issue with bad t=stat (engine hot a/c off). Dublin Caddy ordered parts will have to wait till Friday their coming from reno. I was going to put the stock factory t-stat back in whadda think. Also going for a tune and exhaust any input would be helpful.

Re: Engine HOT - A/C off on 2006 STS-V

I have the same problem even after changing the Tsat. The water pump was replaced 2 months ago under warranty. Any other suggestions? I might go try unplugging the positive battery cable for 30 seconds, but I am not optimistic about this working.

Re: Engine HOT - A/C off on 2006 STS-V

Replaced the new Tstat with yet another Tstat and got the same results. Not to sure how to test them, cause I dropped them in hot boiling water and could see anything change. So, I decided I would try the removal of the positive battery terminal for 30 seconds and whahla, the temp. gauge started to working and the error message went away. Darn, what a way to spend my day off.

Yup finally threw a code had to drive it for a while. Scanned it P0128 coolant temp below Thremostat regulating temp. Cleared it we shall see if it comes back on. I haven't driven it since then i will chime in if it does.